Version 2! Yay!
Ok, I added some things, and took away others. No more huge buttons! Here's whats new:
Menustrip, instead of buttons. Contains File>Open, Batch, Exit; About.
Batch processing, now you can specifiy a folder and the code will get and extract all the blf files.
Progress bar for batch processing.
I also changed the way the files are saved, so now the code determines the image format and saves it with that extension.
Files will be skipped if their extracted counterpart already exists, to save processing time.
The about link populates the textbox with the About information, including a list of the people that helped me out.

People who helped:
OwnZ joO
Luxurious Meat
JacksonCougaAr
Rogue_Modder
unknownv2
Corbin (from phpfreaks.com)
Thanks everyone. And like I said, I know this app is useless, but I figured I'd post my first attempt, so please be nice about it, I don't need to HEAR that it's useless.